Mobile Invoicing Apps: Best 8 Apps for On-the-Go Billing in 2025
Create professional invoices in 60 seconds from your smartphone. Compare the best mobile invoicing apps for field service, freelancing, and remote work.
Picture this: You just wrapped up a successful client meeting at their office. Before you even leave the parking lot, you pull out your phone, create an invoice in 60 seconds, and hit send. The client receives it while the conversation is still fresh, increasing the likelihood of immediate payment.
This is the power of mobile invoicing apps. Whether you're a field service professional, traveling consultant, or remote freelancer, mobile invoicing eliminates the "I'll send it when I get back to the office" delay that often turns into days or weeks.
In this comprehensive guide, you'll discover:
- •8 best mobile invoicing apps compared across iOS and Android platforms
- •Which apps work offline (essential for field service professionals)
- •Mobile payment integration options (Stripe, PayPal, Square)
- •Real-world speed tests: How fast can you actually create an invoice?
- •Template customization capabilities on small screens
Why Mobile Invoicing Matters in 2025
⚡ Speed to Payment
Invoices sent within 24 hours of service have 2.3x higher on-time payment rates than those sent days later. Mobile apps enable instant invoicing while the work is fresh in everyone's mind.
📱 Work Anywhere
62% of freelancers and service professionals now work partially or fully remote. Mobile invoicing apps eliminate the need to return to an office just to send an invoice.
💼 Professional First Impression
Sending a polished invoice immediately after service completion signals professionalism and organization. Clients perceive instant invoicing as a sign of a well-run business.
🔄 Real-Time Sync
Cloud-based mobile apps sync instantly across all devices. Create on mobile, review on tablet, and access full reporting on desktop without data duplication.
8 Best Mobile Invoicing Apps Compared
1. QuickBillMaker
Best Overall Mobile Invoicing App
✅ Best For:
- • International freelancers (26 languages)
- • Mobile-first businesses
- • Users needing offline capability
- • Quick invoice creation (60-second workflow)
⚡ Key Mobile Features:
- • Full offline mode with auto-sync
- • 11 mobile-optimized templates
- • Swipe gestures for quick actions
- • Native iOS & Android apps
- • Mobile payment links (Stripe integration)
- • WhatsApp & SMS sharing
Mobile Speed Test:
Create invoice → Add client → Add line items → Send = 52 seconds average (fastest in category)
2. Invoice2go
Best for Field Service Professionals
✅ Best For:
- • Plumbers, electricians, contractors
- • On-site invoicing at job completion
- • Users wanting pre-designed templates
- • Quick estimates & quotes
⚡ Key Mobile Features:
- • 100+ industry-specific templates
- • GPS mileage tracking
- • Photo attachment (before/after)
- • Signature capture on mobile
- • Works offline
- • Convert estimates to invoices in 1 tap
Unique Mobile Feature:
GPS-based mileage tracking automatically logs travel to/from job sites and adds mileage charges to invoices.
3. FreshBooks
Best for Service Businesses with Time Tracking
✅ Best For:
- • Consultants & agencies
- • Hourly billing professionals
- • Users needing mobile time tracking
- • Team collaboration on mobile
⚡ Key Mobile Features:
- • Built-in mobile timer (start/stop)
- • Photo receipt capture with OCR
- • Client communication hub
- • Mobile expense tracking
- • Push notifications for payments
- • Team time approval on mobile
Mobile Time Tracking:
Start/stop timer from mobile lock screen widget. Automatically converts tracked hours to invoice line items.
4. Wave
Best Free Mobile Invoicing App
✅ Best For:
- • Budget-conscious freelancers
- • US/Canada businesses (best support)
- • Users wanting free accounting + invoicing
- • Startups with limited revenue
⚡ Key Mobile Features:
- • Unlimited free invoices
- • Mobile receipt scanning
- • Bank connection on mobile
- • Payment tracking dashboard
- • Client payment notifications
- • Mobile-optimized invoice templates
Free Forever Model:
Wave makes money from payment processing (2.9% + $0.60) and payroll services. Invoicing and accounting remain 100% free with no invoice limits.
5. Zoho Invoice
Best for High-Volume Mobile Invoicing
✅ Best For:
- • High-volume businesses (100+ invoices/mo)
- • Users already in Zoho ecosystem
- • International businesses
- • Recurring invoice automation
⚡ Key Mobile Features:
- • Offline mode with sync
- • Multi-currency support
- • Mobile recurring invoice setup
- • Client portal on mobile
- • Automated payment reminders
- • Bulk invoice actions
High-Volume Advantage:
Free plan includes 1,000 invoices per year (83/month average). Perfect for businesses outgrowing typical "free tier" limits of 5-10 invoices/month.
6. Square Invoices
Best for Retail + Service Hybrid Businesses
✅ Best For:
- • Businesses using Square POS
- • Retail + custom service work
- • In-person + online payments
- • Simple invoicing needs
⚡ Key Mobile Features:
- • Integrated with Square POS
- • Card-on-file recurring billing
- • Same-day deposits available
- • Text-to-pay invoice links
- • Mobile checkout integration
- • Instant payment notifications
Square Ecosystem Advantage:
If you already use Square for in-person payments, Square Invoices integrates seamlessly. All sales (POS + invoices) appear in one unified dashboard.
7. PayPal Invoicing
Best for International Freelancers
✅ Best For:
- • International payments (190+ countries)
- • Clients who prefer PayPal
- • Existing PayPal business users
- • Multi-currency invoicing
⚡ Key Mobile Features:
- • Mobile app invoicing
- • 25+ currency support
- • Instant PayPal balance access
- • Mobile payment notifications
- • Simple expense tracking
- • QR code invoice payments
Global Payment Advantage:
PayPal supports 25+ currencies and operates in 200+ markets. Best for freelancers with international clients who prefer PayPal's buyer protection.
8. Harvest
Best for Project-Based Billing
✅ Best For:
- • Design & development agencies
- • Project-based consultants
- • Teams needing mobile time tracking
- • Users wanting project profitability
⚡ Key Mobile Features:
- • Mobile time tracking with project tags
- • Automatic invoice from tracked time
- • Project budget tracking on mobile
- • Team timesheets mobile review
- • Expense photo capture
- • Project profitability dashboard
Project-Based Billing:
Track time on mobile by project/task, see real-time budget vs actual, automatically generate invoices from time entries. Perfect for billable hours workflows.
Mobile Features Comparison Matrix
| App | Offline Mode | Native Apps | Mobile Payments | Template Customization | Time Tracking | Starting Price |
|---|---|---|---|---|---|---|
| QuickBillMaker | ✅ | ✅ iOS & Android | ✅ Stripe | ⭐ Full | ❌ | $0 (5/mo) |
| Invoice2go | ✅ | ✅ iOS & Android | ✅ Multiple | ⚠️ Limited | ⚠️ Basic | $5.99/mo |
| FreshBooks | ❌ | ✅ iOS & Android | ✅ Stripe/PayPal | ⚠️ Basic | ⭐ Advanced | $19/mo |
| Wave | ❌ | ✅ iOS & Android | ✅ Wave Payments | ⚠️ Basic | ❌ | $0 (free) |
| Zoho Invoice | ✅ | ✅ iOS & Android | ✅ Multiple | ⚠️ Basic | ✅ Zoho Projects | $0 (1000/yr) |
| Square Invoices | ⚠️ Limited | ✅ iOS & Android | ⭐ Square | ⚠️ Basic | ❌ | $0 (free) |
| PayPal Invoicing | ❌ | ✅ iOS & Android | ⭐ PayPal | ⚠️ Very Limited | ❌ | $0 (free) |
| Harvest | ⚠️ Limited | ✅ iOS & Android | ✅ Stripe/PayPal | ⚠️ Basic | ⭐ Advanced | $12/user/mo |
Legend: ✅ Full Support | ⚠️ Basic/Limited | ❌ Not Available | ⭐ Best-in-Class
How to Choose the Right Mobile Invoicing App
Decision Framework (5 Questions)
1. Do you need offline capability?
YES → QuickBillMaker, Invoice2go, or Zoho Invoice
NO → Any app works (Wave, FreshBooks, Square)
2. Do you bill hourly or track time?
YES → FreshBooks or Harvest (best mobile time tracking)
NO → QuickBillMaker, Wave, or Invoice2go
3. What's your monthly budget?
$0 → Wave (unlimited free) or QuickBillMaker (5 free/month)
$5-15/mo → Invoice2go or Harvest (for time tracking)
$20-50/mo → FreshBooks or QuickBillMaker Pro
4. Are most clients international?
YES → QuickBillMaker (26 languages), PayPal (multi-currency), or Zoho
NO → Any app (Wave best for US/Canada)
5. Do you invoice on-site at job completion?
YES → Invoice2go (field service features) or QuickBillMaker (fastest)
NO → Any app works
Mobile Invoicing Best Practices
✅ DO: Invoice Immediately After Service
Studies show invoices sent within 24 hours have 2.3x higher on-time payment rates. Use mobile apps to invoice before you even leave the client's location.
Pro tip: Save client details and common line items as templates in your mobile app. Invoice creation drops from 5 minutes to 30 seconds.
✅ DO: Enable Offline Mode
Don't let poor cell service delay invoicing. Apps like QuickBillMaker, Invoice2go, and Zoho work offline and auto-sync when you reconnect.
Pro tip: Create draft invoices offline, review/edit when back online, then send. Prevents rushed mistakes.
✅ DO: Use Mobile Payment Links
Include "Pay Now" buttons powered by Stripe, PayPal, or Square. Clients can pay instantly from their phone, increasing payment speed by 40-60%.
Pro tip: Offer multiple payment methods (credit card + bank transfer) to remove friction.
✅ DO: Customize Templates for Mobile Viewing
70% of business emails are opened on mobile. Use clean, mobile-responsive invoice templates with large fonts and clear "Pay Now" buttons.
Pro tip: Preview invoices on your own phone before sending. If it's hard to read, clients won't engage.
❌ DON'T: Rush Invoice Creation
Mobile invoicing is fast, but accuracy matters. Double-check amounts, client details, and payment terms before hitting send. Correction invoices look unprofessional.
Pro tip: Use draft mode. Create invoice immediately, save as draft, review later, then send.
❌ DON'T: Rely on Public Wi-Fi
Public Wi-Fi is insecure. Use cellular data or VPN when invoicing on mobile to protect client financial information and your business data.
Pro tip: Use apps with offline mode to avoid public Wi-Fi entirely. Sync later on secure networks.
Real-World Mobile Invoicing Workflows
🔧 Field Service Professional (Plumber/Electrician)
Scenario: Complete job at client's home, invoice immediately on-site
- Finish job, open Invoice2go on phone
- Select client from saved contacts (or add new)
- Use pre-saved line items (e.g., "Emergency Pipe Repair - $250")
- Add photos of before/after work as attachments
- Client reviews invoice on your phone screen, approves
- Send invoice via email/SMS with "Pay Now" button
- Client pays immediately via card (2.9% fee)
- Mark job complete, move to next appointment
Time saved: 2-3 hours per week not returning to office to invoice
💼 Consultant/Freelancer (Hourly Billing)
Scenario: Track time during week, invoice Friday afternoon
- Use FreshBooks mobile timer all week (start/stop per task)
- Friday 3pm: Open FreshBooks mobile app
- Review tracked hours (automatically categorized by project)
- Tap "Create Invoice from Time Entries"
- App auto-generates line items (e.g., "Strategy Consulting - 8 hrs @ $150/hr")
- Add payment terms (Net 15), send invoice
- Client receives mobile-optimized invoice with "Pay Now" button
Time saved: 1-2 hours per week on manual time calculations and invoice creation
🌍 International Freelancer (Remote Work)
Scenario: Complete project milestone, invoice client in different timezone
- Finish milestone (e.g., website design phase 1) late evening
- Open QuickBillMaker mobile app from couch
- Select client, app auto-detects client's language (Spanish)
- Invoice auto-generates in Spanish with local currency (MXN)
- Add milestone line item: "Diseño Web - Fase 1 - $15,000 MXN"
- Send invoice via WhatsApp (client's preferred method)
- Client receives invoice in Spanish, pays via Stripe in MXN
- Funds convert to USD and deposit to your bank
Benefits: Professional local-language invoices, no currency confusion, instant sending
Related Resources
Invoice Software for Freelancers
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Best Invoice Software 2025
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Best cloud-based invoicing solutions with security analysis, mobile apps, and migration strategies.
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Frequently Asked Questions
What is the best mobile invoicing app for freelancers?
QuickBillMaker is the best overall mobile invoicing app for freelancers with its intuitive mobile interface, offline mode, and support for 26 languages. FreshBooks excels for service businesses with built-in time tracking. Wave is best for budget-conscious freelancers with completely free unlimited invoices. Invoice2go is ideal for field service professionals who need quick on-site invoicing.
Can I create invoices completely offline on mobile?
Yes, several mobile invoicing apps support offline invoice creation: QuickBillMaker, Invoice2go, and Zoho Invoice all allow you to create, edit, and save invoices offline. When you reconnect to the internet, the invoices automatically sync to the cloud. This is essential for field workers, remote locations, or areas with poor connectivity.
Do mobile invoicing apps work on both iPhone and Android?
Most modern mobile invoicing apps are available for both iOS (iPhone/iPad) and Android. QuickBillMaker, FreshBooks, Wave, Zoho Invoice, and Invoice2go all have native apps for both platforms. The features are generally identical across platforms, though iOS apps sometimes receive updates slightly earlier.
Can I accept payments directly through mobile invoicing apps?
Yes, most mobile invoicing apps integrate with payment processors like Stripe, PayPal, and Square. Invoices include "Pay Now" buttons that clients can tap to pay instantly via credit card, debit card, or bank transfer. Typical processing fees are 2.9% + $0.30 per transaction. QuickBillMaker, FreshBooks, Wave, and Zoho all support mobile payments.
How secure is invoicing on a mobile device?
Mobile invoicing apps use bank-level security: 256-bit SSL encryption for data transmission, encrypted local storage on devices, two-factor authentication (2FA) for account access, and automatic timeout locks after inactivity. Enable device passcode/biometric locks and avoid public Wi-Fi for sensitive operations. All major apps (QuickBillMaker, FreshBooks, Wave) are SOC 2 compliant.
Can I customize invoice templates on mobile?
Yes, but capabilities vary by app. QuickBillMaker offers full template customization on mobile including colors, fonts, logos, and layouts. FreshBooks and Zoho allow basic customization (logo, colors, terms). Invoice2go has 100+ pre-designed templates but limited customization. For complex branding, start on desktop then use mobile for invoice creation.
Do mobile invoicing apps sync with desktop versions?
Yes, all cloud-based mobile invoicing apps sync in real-time with desktop web versions. Create an invoice on your phone during a client meeting, and it immediately appears on your desktop when you get back to the office. Changes made on any device sync across all platforms within seconds.
Can I send invoices via WhatsApp or SMS from mobile apps?
Most mobile invoicing apps support multiple sending methods: Email (standard), WhatsApp (share PDF link), SMS/text message (PDF link), and direct link sharing. QuickBillMaker, Invoice2go, and Zoho all support WhatsApp sharing. This is especially useful for international clients or trades/service businesses where WhatsApp is preferred.
Ready to Start Mobile Invoicing?
Create professional invoices in 60 seconds from your smartphone with QuickBillMaker.
✅ Offline mode ✅ 26 languages ✅ Mobile payments ✅ No credit card required